购物车DEMO
来源：互联网 发布：java 连接池框架 编辑：程序博客网 时间：2024/06/10 16:30
最近看了一篇购物车的DEMO代码,分享给他大家,购物车的原理个人感觉就是一个从服务器获得数据,并且展示到本地.主要就是listview展示数据然后展示数据的同时可以做一些交互,修改数量,修改选中等等,直接贴代码
首先一个bean类
package com.example.myshopcart;public class DataBean { int id; int carNum; String shopName; String content; double price; boolean isChoose; public boolean isChoose() { return isChoose; } public void setChoose(boolean isChoose) { this.isChoose = isChoose; } public int getId() { return id; } public void setId(int id) { this.id = id; } public int getCarNum() { return carNum; } public void setCarNum(int carNum) { this.carNum = carNum; } public String getShopName() { return shopName; } public void setShopName(String shopName) { this.shopName = shopName; } public String getContent() { return content; } public void setContent(String content) { this.content = content; } public double getPrice() { return price; } public void setPrice(double price) { this.price = price; }}接下来是主要代码```package com.example.myshopcart;import java.util.ArrayList;import java.util.Iterator;import java.util.List;import android.os.AsyncTask;import android.os.Bundle;import android.app.Activity;import android.content.Intent;import android.text.TextUtils;import android.util.SparseArray;import android.view.LayoutInflater;import android.view.Menu;import android.view.View;import android.view.ViewGroup;import android.view.View.OnClickListener;import android.widget.AdapterView;import android.widget.BaseAdapter;import android.widget.Button;import android.widget.CheckBox;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.ListView;import android.widget.RelativeLayout;import android.widget.TextView;import android.widget.Toast;import android.widget.AdapterView.OnItemClickListener;public class MainActivity extends Activity implements OnClickListener { private static final int INITIALIZE = 0; private ListView mListView;// 列表 private ListAdapter mListAdapter;// adapter private List<DataBean> mListData = new ArrayList<DataBean>();// 数据 private boolean isBatchModel;// 是否可删除模式 private RelativeLayout mBottonLayout; private CheckBox mCheckAll; // 全选 全不选 private TextView mEdit; // 切换到删除模式 private TextView mPriceAll; // 商品总价 // private TextView mSelectNum; // 选中数量 private TextView mFavorite; // 移到收藏夹,分享 private TextView mDelete; // 删除 结算 private double totalPrice = 0; // 商品总价 /** 批量模式下，用来记录当前选中状态 */ private SparseArray<Boolean> mSelectState = new SparseArray<Boolean>(); private ImageView back; private boolean flag = true; // 全选或全取消 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initView(); initListener(); loadData(); } private void initView() { back = (ImageView) findViewById(R.id.back); mBottonLayout = (RelativeLayout) findViewById(R.id.cart_rl_allprie_total); mCheckAll = (CheckBox) findViewById(R.id.check_box_all); mEdit = (TextView) findViewById(R.id.subtitle); mPriceAll = (TextView) findViewById(R.id.tv_cart_total); // mSelectNum = (TextView) findViewById(R.id.tv_cart_select_num); mFavorite = (TextView) findViewById(R.id.tv_cart_move_favorite); mDelete = (TextView) findViewById(R.id.tv_cart_buy_or_del); mListView = (ListView) findViewById(R.id.listview); mListView.setSelector(R.drawable.list_selector); } private void initListener() { mEdit.setOnClickListener(this); mDelete.setOnClickListener(this); mCheckAll.setOnClickListener(this); back.setOnClickListener(this); } private void loadData() { new LoadDataTask().execute(new Params(INITIALIZE)); } private void refreshListView() { if (mListAdapter == null) { mListAdapter = new ListAdapter(); mListView.setAdapter(mListAdapter); mListView.setOnItemClickListener(mListAdapter); } else { mListAdapter.notifyDataSetChanged(); } } private List<DataBean> getData() { int maxId = 0; if (mListData != null && mListData.size() > 0) maxId = mListData.get(mListData.size() - 1).getId(); List<DataBean> result = new ArrayList<DataBean>(); DataBean data = null; for (int i = 0; i < 20; i++) { data = new DataBean(); data.setId(maxId + i + 1);// 从最大Id的下一个开始 data.setShopName("我的" + (maxId + 1 + i) + "店铺"); data.setContent("我的购物车里面的第" + (maxId + 1 + i) + "个商品"); data.setCarNum(1); data.setPrice(305.00); result.add(data); } return result; } class Params { int op; public Params(int op) { this.op = op; } } class Result { int op; List<DataBean> list; } private class LoadDataTask extends AsyncTask<Params, Void, Result> { @Override protected Result doInBackground(Params... params) { Params p = params[0]; Result result = new Result(); result.op = p.op; try {// 模拟耗时 Thread.sleep(500L); } catch (InterruptedException e) { e.printStackTrace(); } result.list = getData(); return result; } @Override protected void onPostExecute(Result result) { super.onPostExecute(result); if (result.op == INITIALIZE) { mListData = result.list; } else { mListData.addAll(result.list); Toast.makeText(getApplicationContext(), "添加成功！", Toast.LENGTH_SHORT).show(); } refreshListView(); } } boolean isSelect = false; private class ListAdapter extends BaseAdapter implements OnItemClickListener { @Override public int getCount() { return mListData.size(); } @Override public Object getItem(int position) { return mListData.get(position); } @Override public long getItemId(int position) { return position; } ViewHolder holder = null; @Override public View getView(final int position, View convertView, ViewGroup parent) { View view = convertView; if (view == null) { holder = new ViewHolder(); view = LayoutInflater.from(MainActivity.this).inflate( R.layout.cart_list_item, null); holder.checkBox = (CheckBox) view.findViewById(R.id.check_box); // shopName = (TextView) view.findViewById(R.id.tv_source_name); holder.image = (ImageView) view .findViewById(R.id.iv_adapter_list_pic); holder.content = (TextView) view.findViewById(R.id.tv_intro); holder.carNum = (TextView) view.findViewById(R.id.tv_num); holder.price = (TextView) view.findViewById(R.id.tv_price); holder.add = (TextView) view.findViewById(R.id.tv_add); holder.red = (TextView) view.findViewById(R.id.tv_reduce); holder.button = (Button) view.findViewById(R.id.btn_delete); holder.frontView = view.findViewById(R.id.item_left); view.setTag(holder); } else { holder = (ViewHolder) view.getTag(); } final DataBean data = mListData.get(position); bindListItem(holder, data); if (data != null) { // 判断是否选择 if (data.isChoose()) { holder.checkBox.setChecked(true); } else { holder.checkBox.setChecked(false); } // 选中操作 holder.checkBox.setOnClickListener(new CheckBoxOnClick(data)); // 减少操作 holder.red.setOnClickListener(new ReduceOnClick(data, holder.carNum)); // 增加操作 holder.add.setOnClickListener(new AddOnclick(data, holder.carNum)); } return view; } class CheckBoxOnClick implements OnClickListener { DataBean shopcartEntity; public CheckBoxOnClick(DataBean shopcartEntity) { this.shopcartEntity = shopcartEntity; } @Override public void onClick(View view) { CheckBox cb = (CheckBox) view; if (cb.isChecked()) { shopcartEntity.setChoose(true); } else { shopcartEntity.setChoose(false); } count(); select(); } } private class AddOnclick implements OnClickListener { DataBean shopcartEntity; TextView shopcart_number_btn; private AddOnclick(DataBean shopcartEntity, TextView shopcart_number_btn) { this.shopcartEntity = shopcartEntity; this.shopcart_number_btn = shopcart_number_btn; } @Override public void onClick(View arg0) { shopcartEntity.setChoose(true); String numberStr = shopcart_number_btn.getText().toString(); if (!TextUtils.isEmpty(numberStr)) { int number = Integer.parseInt(numberStr); int currentNum = number + 1; // 设置列表 shopcartEntity.setCarNum(currentNum); holder.carNum.setText("" + currentNum); notifyDataSetChanged(); } count(); } } private class ReduceOnClick implements OnClickListener { DataBean shopcartEntity; TextView shopcart_number_btn; private ReduceOnClick(DataBean shopcartEntity, TextView shopcart_number_btn) { this.shopcartEntity = shopcartEntity; this.shopcart_number_btn = shopcart_number_btn; } @Override public void onClick(View arg0) { shopcartEntity.setChoose(true); String numberStr = shopcart_number_btn.getText().toString(); if (!TextUtils.isEmpty(numberStr)) { int number = Integer.parseInt(numberStr); if (number == 1) { // Toast.makeText(CartListActivity.this, "不能往下减少了", // Toast.LENGTH_SHORT).show(); } else { int currentNum = number - 1; // 设置列表 shopcartEntity.setCarNum(currentNum); holder.carNum.setText("" + currentNum); notifyDataSetChanged(); } } count(); } } private void bindListItem(ViewHolder holder, DataBean data) { // holder.shopName.setText(data.getShopName()); holder.content.setText(data.getContent()); holder.price.setText("￥" + data.getPrice()); holder.carNum.setText(data.getCarNum() + ""); int _id = data.getId(); boolean selected = mSelectState.get(_id, false); holder.checkBox.setChecked(selected); } @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { DataBean bean = mListData.get(position); ViewHolder holder = (ViewHolder) view.getTag(); int _id = (int) bean.getId(); boolean selected = !mSelectState.get(_id, false); holder.checkBox.toggle(); // 将CheckBox的选中状况记录下来 mListData.get(position).setChoose(holder.checkBox.isChecked()); // 调整选定条目 if (holder.checkBox.isChecked() == true) { totalPrice += bean.getCarNum() * bean.getPrice(); } else { mSelectState.delete(position); totalPrice -= bean.getCarNum() * bean.getPrice(); } mPriceAll.setText("￥" + totalPrice + ""); if (mSelectState.size() == mListData.size()) { mCheckAll.setChecked(true); } else { mCheckAll.setChecked(false); } } } class ViewHolder { CheckBox checkBox; ImageView image; TextView shopName; TextView content; TextView carNum; TextView price; TextView add; TextView red; Button button; // 用于执行删除的button View frontView; LinearLayout item_right, item_left; } @Override public void onClick(View v) { // TODO Auto-generated method stub switch (v.getId()) { case R.id.subtitle: isBatchModel = !isBatchModel; if (isBatchModel) { mEdit.setText(getResources().getString(R.string.menu_enter)); mDelete.setText(getResources().getString(R.string.menu_del)); mBottonLayout.setVisibility(View.GONE); mFavorite.setVisibility(View.VISIBLE); } else { mEdit.setText(getResources().getString(R.string.menu_edit)); mFavorite.setVisibility(View.GONE); mBottonLayout.setVisibility(View.VISIBLE); mDelete.setText(getResources().getString(R.string.menu_sett)); totalPrice=0; mPriceAll.setText("￥"+totalPrice);; } break; case R.id.check_box_all: totalPrice = 0; if (mCheckAll.isChecked()) { for (int i = 0; i < mListData.size(); i++) { mListData.get(i).setChoose(true); // 如果为选中 if (mListData.get(i).isChoose()) { totalPrice = totalPrice + mListData.get(i).getCarNum() * mListData.get(i).getPrice(); } } // 刷新 mListAdapter.notifyDataSetChanged(); // 显示 mPriceAll.setText(totalPrice + "元"); } else { for (int i = 0; i < mListData.size(); i++) { mListData.get(i).setChoose(false); // // 刷新 mListAdapter.notifyDataSetChanged(); } mPriceAll.setText(totalPrice + "元"); } break; case R.id.tv_cart_buy_or_del: if (isBatchModel) { Iterator it = mListData.iterator(); while (it.hasNext()) { // 得到对应集合元素 DataBean g = (DataBean) it.next(); // 判断 if (g.isChoose()) { // 从集合中删除上一次next方法返回的元素 it.remove(); } } // 刷新 mListAdapter.notifyDataSetChanged(); } else { if (totalPrice != 0) { // // Intent intent = new Intent(); // intent.setClass(MainActivity.this, // OrderFillActivity.class); // startActivity(intent); } else { Toast.makeText(MainActivity.this, "请选择要支付的商品", Toast.LENGTH_SHORT).show(); mListAdapter.notifyDataSetChanged(); return; } } break; case R.id.back: onBackPressed(); break; default: break; } } /** * 计算价格 */ public void count() { totalPrice = 0;// 人民币 if (mListData != null && mListData.size() > 0) { for (int i = 0; i < mListData.size(); i++) { if (mListData.get(i).isChoose()) { totalPrice = totalPrice + mListData.get(i).getCarNum() * mListData.get(i).getPrice(); } } mPriceAll.setText("￥" + totalPrice + ""); } } public void select() { int count = 0; for (int i = 0; i < mListData.size(); i++) { if (mListData.get(i).isChoose()) { count++; } } if (count == mListData.size()) { mCheckAll.setChecked(true); } else { isSelect = true; mCheckAll.setChecked(false); } }}xml<div class="se-preview-section-delimiter"></div> 0 0
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